Gas burner construction



Mmh 19, i946. H. E MILLS 2,396,800

GAS BURNER CONSTRUCTION Filedv sept. 8, 1941 Patented Mar. l19, 1'946 I' HerbertE-Miu'sycive1ana, Tenn. Application lseptember1;,A 1941 seriai No. 409,982 f i -2 claims. (ci. 15s-99) The present invention relates to gas burners and to novel methods of making the same.

Among the objects of the present invention 'is to provide an' improved gas burner for stoves and the like which can be fabricated at 10W cost and which may be easily andl readily assembled to provide a completed product with eicient'burriingcharacteristics, as well as to .provideastructure which lends itself to novel procedures and methods in the manufacture and assembly of the parts thereof.

At the present time gas burners-of the type herein under consideration have been preferably `i formed, because of ease in securing certain metals,

to include a cast iron base and an aluminum capv constituted. by a die casting formed on its lower surface with a plurality of alternately arranged protuberances and depressions which,v in cooperative relation with the base,'provide rather .accurately formed escapement ports for gas flowing from the mixing chamber in the base intothe environment of the said cap. `Aluminum lendsl itself readily to such die casting operations, butl due to the limited supply of `such material at the present time due to priority given to certain types of articles for national defense purposes, it has been found desirable to look toother metal sources for. the formation of such gas burners accurate gas escapement ports communicating with the mixing chamber of the said device.' Y

' Still a further object of the present inventionl is to provide a novel gas burner of multi-part construction as above exempliiied,y wherein the ring member forming the gas escapement ports in the assembled'structure may be of different thicknesses and the cut-out sections formed in any desired manner so that the said ring members of varying construction may be interchangeably assembled with the cap and base toprovide for gasescapement ports of varying characteristics in order to adapt the said gas burners-to different v types of gas and for Varying flow characteristics.

The present invention includes as an object the provision of a novel gas burner of multip`art construction as hereinabove set forth wherein the cap, as well as thering member interposed between the cap and the base, may be constructed to provide for inner and outer gas escapementports.

'I'he present improvement lends itself admirably to the provision of accurately'formed gas escapement ports by the use oan intermediate ring member between a cap and base of sheet metal.

The present invention also has as an object the provision of a gas burner of multi-part construc-r tion in which both the cap assembly and the base are formed from sheet metal by a stamping operation.

l0 Still further, the present invention has as an curately formed to provide the degree of efciency i `to which the trade has become accustomed in this particular field. In one of the aspects of the present invention the novelV structure involved embraces a gas burner of multi-part constructionV including a base and a cap with an interposed element having parts thereof' cut out to provide, when in assembled `relation with the cap and base, accurately formed gas escapement ports coxnmunicating with a .mixing chamber of the said device.

Another object within the purview of the present .invention is to provide a novel gas burner of the type herein disclosed which is of multi-part conobject the provision of novel methods whereby the 1 gas burner structures hereinabove identifiedare assembled.

Other objects, features, capabilities and advantages are comprehended' by the invention, as will iter appear and as are'inherently possessed there- Referring to the drawing: l Figure 1 is a top plan view of a gas burner made o in accordance with the present invention;

struction including a cap and base having complementary seating surfaces and an interposed ring member seating accurately with said surfaces and being provided with cut-out sections forming Il feeding orifice I8, the said base 2 being provided- Figure 2 is a view in cross-section taken in the planes represented by lines 2-2 of Figure l of the drawing.

Referring now more in detail to the drawing. a gas burner embodying the novel improved structure according to the present invention is shown as being completely assembled from metal stampings, the main parts of which comprise a base 2, a cap 4 vand an interposed spacer ring member 6. The base 2 is of multi-part construction including the lower and upper parts 8 and I0 secured together by means of a4 seam l2 to provide mixing chamber I4 formed at one end withjan opening i6 to receive a conventional gas immediately above the said orifice I8 with an adjustable air shutter to admit of regulated quantities of air into the chamber for mixing with the gas introduced through the orifice '|B. Furthermore,the said base 2 is provided with a Venturi throat as at 22 which is located immediately adjacent the orifice I8 and the air'shutter 20. The lower part 8 adjacent the end opposite the opening I6 is formed with the inwardly disposed annular wall 24 which is `threaded as at 26 to receive the threaded cylindrical tubular part 28 of the cap 4 providing the central fluefor the burner. The upper part lll which completes the mixer tube assembly formed by the base 2 includes an inwardly disposed annular flange 3l!k having its upper surface rather accurately formed to provide proper seating relation with the interposed ring member 6 ofthe cap assem-y bly. o

The cap member 4 is formed from a singlesheet of metal to include the centrally disposed cylindrical or tubular part 28 and rthe outwardly di' verging conical shaped apron 32, the lower surfaceof which is substantially smooth to provide a proper seating surface for the ring member 6.

This ring member-6 is of annular conical structure adapted toA seat with ytheunder and top surfaces of the apron 32 and flange 30, respectively,

when the cap assembly is connected to the base f the central flue formed by the tubular part 28 to provide proper depth for theinner gas escapechamber H.

AThe parts of the gas burner as described may be readily fabricated by stamping a metal sheet to form the various parts ofk the assembly which, in the case ofthe cap and spacer members, are cutto provide suitable apertures or openings forming gas escapement ports in the assembled structure. The parts with which the ring member seats are so. formed as to provide accurate gas escapement ports for enicient burning characteristics of the gas burner.

In assembling the device as above described, the base may be formed from `the two parts shown and with the inwardly disposed flange 38 accurately bent to provide a proper seating surface for the cap assembly. The cap assembly is rst formed byshaping the cap member as disclosed, after which the ring member, which has ment ports communicating with the mixing likewise been suitably formed by a stamping operation, may be assembled in seating relation to edge of the ring member 6 and disposed adjacent y the under surface ofthe apron l32, after which thesame may be secured thereto in operative relation as by welding or the like. VApertures providing they gas escapement ports 38. may be drilled A,or otherwise formed through the apron 32 and the ring member 6. After the cap assembly has been formed,lthe same may be threaded into the base as at 26 into proper seating relation withthe inwardly disposed nange 30 to form thecompleted structure. l

As will be clearly appreciated from the above description, the ring member 6 may be of any thickness, and the sections forming the gas escapement ports in the assembly proper may be cut to any size or shape as desired. Accordingly, ring members varying in the particulars'specled may be introduced interchangeably between the cap and base members. This is of particular advantage whereV it is desired to change the burning characteristic of 'any gas burner,l and further provides for selectivity in any gas burner ofr the present construction by the "mere expedient of having a supply of ring members of various sizes and designs.

While I have herein described and upon the drawing shown anl illustrative embodiment of the invention, itisr to be understood that the invenpended claims.I

I claim: i

l. 'A gas burner formed from sheet metal and comprising a supporting base and a cap assembly mounted thereon, said supporting base being of two-part construction wherein said parts form an annular chamber and a laterally extending mixing'chamber in'communication therewith, one of saidparts'being formed with a bottomwall providing the bottom for said burner and having an upwardly extending flue-forming wall part disposed centrally of said annular chamber, said part also being provided with upstanding wall parts forming the outer walls for said annular chamber and said mixing chamber, the other of said parts being constituted by wall #parts providing a connection to said first part and forming a continuation of the vouter wall of said annular chamber and a top wall for said mixing chamber, lsaid last-named part also providinga seat for said cap assembly, means providing a connection between the parts of said supporting base in a plane substantially defining the topof said mixing chamber, said cap assembly comprising a member of dish-shaped formation having a central securing part adapted to be connected to said iiue forming wall part of said base to provide an. upwardly extendingf-opening through said burner, said assembly further including a spacer ring member interposed between said seat and said Vfirst-,named member of said assembly and being formed with marginal openings forming escapement portsv at the outer margins of said l burner, said cap vand ring member having a series providing the bottom for vsaid burner and having an upwardly extending nue-forming wall part disposed centrally of said annular chamber, said part also being provided with upstanding wall parts forming the outer walls for said annular chamber and said mixing chamber, the other of said parts being constituted by wall parts providing a connection to said first part and forming a continuation of the outer wall ofy said anchamber, said last-named part alsol providing va seat for said cap assembly, a `seam joint providing a connection between the parts of saidsnpporting d aamaaooA A, nuiar chamber and a top wali for said mixing burner, said-assembly further in'cidinga spacer ring member interposed between said seat-and. said first-named memberI of said assembly and n being formed with marginal openingsforming escapement ports at the outer margins of saidV burner, said cap and ring member having a series of aligned openings disposed inwardly of said outer wall ofv said chamber and providing inner escapement ports for said burner. n* Y 

